It all depends on the customs official. But most customs officials can be bribed.
This is the most insensitive and incorrect advice I have seen on this forum. I have dealt with a large number of customs officials in Chennai, Delhi, and Mumbai. I never had to bribe even once. As long as you are not doing anything illegal, I see no reason to even think in these lines. And, of course, you should not do anything illegal. Even when there was legal notice served on me by Customs in Chennai, I was able to clear the issue easily by providing the required documentation. I was advised by a number of lawyers and clearing agents to settle the issue through 'payments'. I simply refused. I worked with a honest lawyer who presented the case properly, and the notice was withdrawn.
Cheers